Joining metal rods and bars.



No. 687,660. Patented Nov. 26, l90l. 0. SCHULTZ.

JOINING METAL RODS AND BARS.

(Application filed Dec. 93, 1899.)

(No Model.)

jg 4 a;

lya i UNITED STATES I ATENT Prion.

OTTO SCHULTZ, OF BERLIN, GERMANY.

JOINING METAL RODS AND BARS.

SPECIFICATION forming part of Letters Patent No. 687,660, dated November 26, 1901..

Application filed December 23, 1899. Serial No. 741,457. (No model.)

To all whom it may concern.-

Be it known that I, OTTO SCHULTZ, manufacturer, a subject of the King of Prussia, German Emperor, residing at Berlin, in the Kingdom of Prussia, Germany,have invented certain new and useful Improvements in Join ing Metal Rods and Bars, of which the following is a specification.

My invention relates to an improved method of joining or securing together metal bars and rods for forming grates and the like. Heretofore such bars have been joined or united together either by welding or by means of rings, rivets, or screws.

My invention consists in forming an opening in one bar, inserting the other bar in said opening, bending said bar on opposite sides of the opening, and then subjecting the bar with the opening to pressure, all as hereinafter fully described, and pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification.

Figure 1 is a side and cross-sectional view of one bar or rod to be united. Fig. 2 is a side elevation and a cross-sectional view of the other bar or rod. Fig. 3 is a side elevation, partly in section, showing one bar inserted in the opening of the other bar and before they have been secured together. Fig. 4 is a similar View showing the parts joined or united. Fig. 5 is a plan View of the same. Fig. 6 is a side view of one bar, showing it provided with differently-shaped openings. Figs. 7 and 8 are respectively a side view, partly in section,

and a side View of different forms of bars secured together; and Fig. 9 is a plan and side the bars together, the bar a having been inserted in the opening 0 of the T-iron, as shown in Fig. 3, the bar a is bent on opposite sides of the web of the T-iron into contact with the base thereof, as shown in Fig. 4, and then the T- iron is subjected to pressure of the bulge or enlargement d, to flatten the same, and thereby contract the opening 0, when the parts will be firmly and securely joined or united together.

Instead of flat bars bars of other shapes may be united. or joined to the T-iron, and when such bars are used the opening in the T-iron is to be of the same shape as the bars.

In Fig. 6 the T-iron e is shown provided with round, square, and \l shaped openings f g h, thus permitting correspondingly-shaped bars to be secured thereto. In Fig. 7 a flat bar a is secured in an angle or L iron t', and

in Fig. 8 a round barjis secured to a flat bar [6.

In Fig. 9 I have shown several bars united to a T- iron. In this case the T-iron o is formed with an opening of a size equal to that of the combined bars or pieces Z m n. It is to be understood that the center bar or piece m is to be inserted in the opening after the other bars or pieces Z n have been placed in position.

When light or small bars or rods are to be united, it will not be necessary to heat them, as they can be readily bent while cold; but in the case of large or thick bars they will have to be heated and secured together While hot.

' I claim-- 1. The method herein described of uniting a rod or bar with an angle-iron, consisting in inserting the rod or bar in an opening of one member of the angle-iron, said opening being of the shape of the bar or rod, bending the rod or bar on opposite sides of the said member into contact with the imperforate member of the angle-iron, and finally subjecting the member of the angle-iron having the opening to pressure to contract the said opening, as set forth.

2. The combination of an angle-iron having an opening in one member a short distance from its other member, and a bar or rod of the shape of the opening in the angle-iron and arranged therein, said rod -or bar being bent on opposite sides of the member through which it passes into contact with the imper- 5 forate member, as set forth.

3. The combination of a T-shaped iron having an opening in its web a short distance from its base and a plurality of bars fitting in the opening of the angle-iron and each bent on opposite sides of the web into contact with 16 the head of the T-iron, as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

OTTO SCHULTZ. Witnesses:

WOLDEMAR HAUPT, HENRY HASPER. 

